	@mixin radius($r:50%) {
		border-radius: $r;
	}
	@mixin flex($jc:center,$ai:center) {
		display: flex;
		justify-content: $jc;
		align-items: $ai;
	}
	@mixin headerBoxBlack() {
		 width: 50px;
		 height: 50px;
		 background-color: rgba(0, 0, 0, 0.5);
		 color: #fff;
		 @include radius();
		 @include flex();
	}